#!/usr/bin/env python3

import numpy as np
import matplotlib.pyplot as plt

N=50
x=np.random.rand(N)
y=np.random.rand(N)
colors=np.random.rand(N)
area=np.pi*(15*np.random.rand(N))**2

print(area)

#plt.scatter(x,y,s=area,c=colors,alpha=0.5)
plt.hist(area)

plt.show()
